The Shell Command Line
Having a basic understanding of the capabilities of the shell command line can help you write better shell scripts. If, after you have finished reading this short introduction, you want to learn more about the command line, check out Chapter 11, “Command-Line Master Class.” You can use the shell command line to perform a number of different tasks, including the following:
Searching files or directories with programs using pattern matching or expressions. These commands include the GNU gawk (linked as awk) and the grep family of commands, including egrep and fgrep.
Getting data from and sending data to a file or command, ...
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